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\section{IPython Notebooks}  Another very popular solution among scientists for bundling together research data, analysis, and code is the \href{http://ipython.org/notebook.html}{IPython Notebook}. IPython NB is a web-based interactive computational environment where you can combine code execution, text, mathematics, plots and rich media into individual documents. These documents can now be imported, visualized and executed within Authorea!  So, if you already use IPython Notebook to collect all your analysis and generate your plots, you can now include these notebooks in your published articles on Authorea. Let's suppose that you are This notebook uses the SymPy package to perform symbolic manipulations, and combined with numpy and matplotlib, also displays numerical visualizations of symbolically constructed expressions.